- Category: Water Feature
- Type: Island
- Latitude/Longitude: 51°52'2"N 5°12'5"W
- Eastings/Northings: 179683, 223601
- OS Grid: SM796236
- Mapcode Local: GBR C8.SGH3
- Mapcode Global: VH0TM.SBJ9
Location and coordinates are for the approximate centre of Gewni within this administrative area.
Geographic features and populated places may cross administrative borders.